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Portugal

$481+ Cheap flights from Portland, ME (PWM) to Portugal

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 6/9. Fares are subject to change and may not be available on all flights or dates of travel.
PWM — LIS
May 29 — Jun 51
Fri 5/29
Fri 6/5
1 adult, Economy
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Cheap flight deals from Portland to Portugal

Cheapest flights from Portland to Portugal
Explore the most affordable flight options available from Portland to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 29, 2026.

This United Airlines deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/39:10 am
PWM
-
OPO
1 stop19h 20m
United Airlines
Fri 11/66:00 am
OPO
-
PWM
2 stops21h 57m
United Airlines
Deal found 4/29$718
This KLM deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:51 pm
PWM
-
LIS
1 stop12h 09m
KLM
Mon 5/47:45 pm
LIS
-
PWM
2 stops25h 12m
KLM
Deal found 4/25$878
This Air France deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:51 pm
PWM
-
LIS
2 stops15h 24m
Multiple Airlines
Mon 5/47:45 pm
LIS
-
PWM
2 stops25h 12m
Multiple Airlines
Deal found 4/26$882
This Air France deal was found by Cheapflights users on 4/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:51 pm
PWM
-
LIS
2 stops14h 54m
Air France
Mon 5/46:50 pm
LIS
-
PWM
2 stops24h 21m
Air France
Deal found 4/29$890
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/293:22 pm
PWM
-
LIS
1 stop11h 58m
United Airlines
Mon 5/411:25 am
LIS
-
PWM
2 stops32h 24m
United Airlines
Deal found 4/25$918
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/309:00 am
PWM
-
LIS
2 stops20h 30m
United Airlines
Wed 5/612:55 pm
LIS
-
PWM
2 stops37h 24m
United Airlines
Deal found 4/25$928
This Delta deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/292:51 pm
PWM
-
LIS
1 stop12h 09m
Delta
Mon 5/410:00 am
LIS
-
PWM
1 stop19h 46m
Delta
Deal found 4/28$938
This United Airlines deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/910:55 am
PWM
-
OPO
1 stop15h 00m
United Airlines
Tue 8/1812:15 pm
OPO
-
PWM
2 stops30h 39m
United Airlines
Deal found 4/26$954
This British Airways deal was found by Cheapflights users on 4/24. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:03 pm
PWM
-
LIS
2 stops19h 32m
Multiple Airlines
Fri 10/167:20 am
LIS
-
PWM
2 stops21h 04m
Multiple Airlines
Deal found 4/24$974
This United Airlines deal was found by Cheapflights users on 4/25. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/38:15 pm
PWM
-
OPO
1 stop32h 30m
United Airlines
Sun 9/1312:15 pm
OPO
-
PWM
2 stops50h 57m
United Airlines
Deal found 4/25$1,120
This oojo deal was found by Cheapflights users on 4/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/202:40 pm
PWM
-
PDL
1 stop12h 05m
Multiple Airlines
Fri 7/245:30 pm
PDL
-
PWM
1 stop10h 44m
Multiple Airlines
Deal found 4/26$1,146
This FlightHub deal was found by Cheapflights users on 4/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/1211:08 am
PWM
-
OPO
2 stops41h 07m
Austrian Airlines
Mon 6/810:10 am
OPO
-
PWM
2 stops37h 25m
Austrian Airlines
Deal found 4/28$1,157

Find flight deals from Portland to Portugal

Keep the following information in mind while searching for Portland to Portugal flight deals. Data was last updated April 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$954
(United Airlines)

One-way from

$481
(Kiwi.com)

Popular in

December

Cheapest in

February

Average price

$1,233
Provider with most accurate pricing for Portland-Lisbon Humberto Delgado flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Lisbon Humberto Delgado flights.
Search Deals
From Portland to Portugal
Search Deals
One-way flight from Portland to Portugal
Search Deals
Highest demand for flights based on searches. 10% potential increase in price ($123 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 13% potential price decrease ($126 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in April 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Portland to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2026.
Use the filters below to find and compare flights from Portland to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandPorto

PWM - OPO

PWMOPO

Portland

Sun 8/9

10:55 am-6:55 am

1 stop15h 00m

Porto

Tue 8/18

12:15 pm-1:54 pm

2 stops30h 39m

$954

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 10/9

3:03 pm-3:35 pm

2 stops19h 32m

Lisbon Humberto Delgado

Fri 10/16

7:20 am-11:24 pm

2 stops21h 04m

$974

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Fri 10/9

6:00 am-9:20 am

2 stops22h 20m

Lisbon Humberto Delgado

Fri 10/16

10:25 am-11:27 pm

1 stop18h 02m

$1,047

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 8/9

6:46 pm-9:05 am

1 stop9h 19m

Lisbon Humberto Delgado

Sun 8/16

11:05 am-8:17 pm

1 stop14h 12m

$1,055

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Sun 8/9

5:15 am-10:30 am

1 stop24h 15m

Lisbon Humberto Delgado

Sun 8/16

1:00 pm-10:02 am

2 stops50h 02m

$1,084

PortlandPorto

PWM - OPO

PWMOPO

Portland

Thu 9/3

8:15 pm-9:45 am

1 stop32h 30m

Porto

Sun 9/13

12:15 pm-10:12 am

2 stops50h 57m

$1,120
Quickest round-trip

PortlandPonta Delgada

PWM - PDL

PWMPDL

Portland

Mon 7/20

2:40 pm-6:45 am

1 stop12h 05m

Ponta Delgada Nordela

Fri 7/24

5:30 pm-12:14 am

1 stop10h 44m

$1,146

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 5/12

11:08 am-9:15 am

2 stops41h 07m

Porto

Mon 6/8

10:10 am-6:35 pm

2 stops37h 25m

$1,157

PortlandPorto

PWM - OPO

PWMOPO

Portland

Tue 5/12

11:08 am-3:45 pm

2 stops23h 37m

Porto

Mon 6/8

12:35 pm-11:30 pm

1 stop15h 55m

$1,227

PortlandLisbon

PWM - LIS

PWMLIS

Portland

Thu 6/11

3:16 pm-1:40 pm

2 stops17h 24m

Lisbon Humberto Delgado

Thu 6/18

11:25 am-11:51 pm

2 stops41h 26m

$1,232

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/27

Showing 1-10 of 25 resultsSorted by cheapest first
1
2
3

Best time to book a flight from Portland to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Portland with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Portland to Portugal
No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated April 29, 2026.
See what other customers who have flown with United Airlines from Portland to Portugal have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
9,680 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.
United Airlines
7.4
Good
9,680 reviews
United Airlines
7.4
Good
9,680 reviews

Comfort

7.3

Overall

7.4

Food

6.6

Crew

8.1

Boarding

7.7

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Apr 2026

DFW - EWR

The flight was on time. Crew was friendly. Will fly again. The seats was comfortable.

Related info for your journey

Find useful and relevant information for your journey from Portland to Portugal. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from Portland to Portugal?

    For a flight from Portland to Portugal, you will be flying from Portland. Portland (PWM) is just 2.9 mi from the center of the city.

  • How long is the flight from Portland, Maine to Portugal?

    For as low as $1,055, United Airlines can have you in Portugal from Portland, Maine in 9h 19m. The distance between Portland, Maine and Portugal is about 3123 mi. This flight may include one or multiple stops.

  • What are the most popular routes from Portland, Maine to Portugal?

    The most popular flight routes from Portland, Maine to Portugal are Portland - Lisbon Humberto Delgado, Portland - Ponta Delgada Nordela and Portland - Porto.

  • Can I find deals for flights from Portland to Portugal that include hotel bookings?

    Yes. In addition to deals on Portland to Portugal flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Portland to Portugal?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Portland to Portugal.

  • Can I find deals for business class flights from Portland to Portugal?

    Yes. Cheapflights offers flight deals from Portland to Portugal by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from Portland to Portugal

Discover the top airline that operate flights from Portland to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated April 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$550Average$729FlexibilityNo cancel feeOn-time69%

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